Finding the Fourth Proportional to 31,016.08, 42,803.94 and 16,868.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.08 : 42,803.94 = 16,868.64 : x
2. Step 2: Convert to fraction form
   31,016.08/42,803.94 = 16,868.64/x
3. Step 3: Cross multiply
   31,016.08x = 42,803.94 × 16,868.64
4. Step 4: Simplify right side
   31,016.08x = 722,044,254.44
5. Step 5: Solve for x
   x = 722,044,254.44/31,016.08
6. Step 6: Final answer
   x = 23,279.67